Danfoss VLT FC 300 Service Manual

3.3.4 Brake Option 42
3.3.5 Cooling Fans 44
3.3.6 Fan Speed Control 44
3.3.7 Load Sharing & Regeneration 45
3.3.8 Specific Power Card Connections 45
4 Troubleshooting
46
4.1 Troubleshooting Tips
46
4.2 Exterior Fault Troubleshooting
46
4.3 Fault Symptom Troubleshooting
46
4.4 Visual Inspection
47
4.5 Fault Symptoms
48
4.5.1 No Display 48
4.5.2 Intermittent Display 48
4.5.3 Motor Will not Run 48
4.5.4 Incorrect Motor Operation 49
4.6 Warning/Alarm Messages
49
4.7 After Repair Tests
58
5 Adjustable Frequency Drive and Motor Applications
59
5.1 Torque Limit, Current Limit, and Unstable Motor Operation
59
5.1.1 Overvoltage Trips 60
5.1.2 Line Phase Loss Trips 60
5.1.3 Control Logic Problems 61
5.1.4 Programming Problems 61
5.1.5 Motor/Load Problems 62
5.2 Internal Adjustable Frequency Drive Problems
62
5.2.1 Overtemperature Faults 62
5.2.2 Current Sensor Faults 62
5.2.3 EMI Signal and Power Wiring 63
5.2.4 Effects of EMI 63
5.2.5 Sources of EMI 64
5.2.6 EMI Propagation 64
5.2.7 Preventive Measures 67
5.2.8 Proper EMC Installation 68
6 Test Procedures
69
6.1 Introduction
69
6.1.1 Tools Required 69
Contents Service Manual
Danfoss A/S © Rev. 2014-02-10 All rights reserved. MG94A222

Danfoss VLT FC 300 Specifications

General

Brand	Danfoss
Model	VLT FC 300
Category	DC Drives
Language	English